| 摘要 |
<p>Threaded metal component is fitted on a plastic injection-moulded welding box by inserting a metal part into cylindrical cavities moulded into the box. The cavities are perpendicularly divided by a central rectangular opening so that a nut fitted in the opening has a threaded hole concentric with the cylindrical cavity, and an outside thread diameter smaller than the cylindrical cavity.</p> |
